Toroidal-type continuously variable transmission

A toroidal-type continuously variable transmission, comprising:

• an input shaft supported to be rotatable;
• an input side disk including an inner surface having a section thereof formed as an arc-shaped concave surface and rotatable together with said input shaft;
• an output side disk including an inner surface opposed to said inner surface of said input side disk and having a section formed as an arc-shaped concave surface, disposed coaxially with said input side disk, and supported so as to be rotatable with respect to said input side disk;
• a trunnion disposed to be swingable about a pivot shaft situated at a twisted position with respect to center axes of said input side and output side disks;
• a displacement shaft supported on said trunnion;
• a pivot shaft formed on one end of said trunnion;
• a plurality of power rollers respectively including peripheral surfaces formed as spherical-shaped convex surfaces, supported on said displacement shaft to be rotatable, and held by and between said input side and output side disks;
• a thrust rolling bearing positioned between the outer surfaces of said power rollers and the inner surface of said trunnion;
• and,
• an oil supply passage formed in said trunnion,
• wherein said oil supply passage is structured by a groove formed in the inner surface of said trunnion, one end of the groove extending up to a penetration hole formed in the pivot shaft, and a cover member for covering said groove.